Where did most of the fighting in the Philippine-American War take place?

The major operations of the Philippine-American War were conducted on the island of Luzon.1

While the conflict began with the Battle of Manila in February 1899, the fighting subsequently spread into the countryside. Following the transition to guerrilla warfare in late 1899, the insurrection continued across various regions, including notable resistance in Samar and Batangas province. Additionally, sporadic fighting associated with the Moro resistance occurred on the island of Mindanao until 1913.21